On the first one, isn't there a concern about uke rolling his toes underneath him and exploding his own knee as he goes down?

I'm gonna try the advanced one the next time I get to start standing in BJJ. Which is unfortunately almost never.

"The only important elements in any society
are the artistic and the criminal,
because they alone, by questioning the society's values,
can force it to change."-Samuel R. Delany

RENDERING GELATINOUS WINDMILL OF DICKS

THIS IS GOING TO BE THE BEST NON-EUCLIDIAN SPLATTERJOUST EVER

It seems that the only people who support anarchy are faggots, who want their pathetic immoral lifestyle accepted by the mainstream society. It wont be so they try to create their own.-Oldman34, friend to all children

On the first one, isn't there a concern about uke rolling his toes underneath him and exploding his own knee as he goes down?

I think this is being distorted a bit by uke stepping off the uchimata in an unrealistic manner. (Or at least he gets into a position where you wouldn't want to finish the way tori does)

Typically you wouldn't plant your foot back in a well spread karate stance like that after hopping off the uchimata. You'll land (or be on your way to landing) onto one foot in a fairly precarious position where a kosoto or dai-ashi can clip you down fairly handy.

If uke did land in that karate stance, I'd probably attack the other foot, or maybe look to take them on another forward throw out to the side.

I think this is being distorted a bit by uke stepping off the uchimata in an unrealistic manner. (Or at least he gets into a position where you wouldn't want to finish the way tori does)

Typically you wouldn't plant your foot back in a well spread karate stance like that after hopping off the uchimata. You'll land (or be on your way to landing) onto one foot in a fairly precarious position where a kosoto or dai-ashi can clip you down fairly handy.

If uke did land in that karate stance, I'd probably attack the other foot, or maybe look to take them on another forward throw out to the side.